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Eureka! chapter 4 lesson
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Scientists and Engineers are Observant
Disciplinary Core Ideas
Different organisms vary in how they look and function because they have different inherited information.
Some kinds of plants and animals that once lived on Earth are no longer found anywhere.
Sometimes the differences in characteristics between individuals of the same species provide advantages in surviving, finding mates, and reproducing.
The environment also affects the traits that an organism develops.
Fossils provide evidence about the types of organisms that lived long ago and also about the nature of their environments.
Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction.
The food of almost any kind of animal can be traced back to plants. Organisms are related in food webs in which some animals eat plants for food and other animals eat the animals that eat plants. Some organisms, such as fungi and bacteria, break down dead organisms (both plants or plants parts and animals) and therefore operate as “decomposers.” Decomposition eventually restores (recycles) some materials back to the soil. Organisms can survive only in environments in which their particular needs are met. A healthy ecosystem is one in which multiple species of different types are each able to meet their needs in a relatively stable web of life. Newly introduced species can damage the balance of an ecosystem.